have several projects going at once. that way you can get gigs or play at festivals under many different guises (and not only as "oh - we had him last year, we can't book him again").

teach

get on the Arts Councils touring circuits

tour tour tour

continue to record and sell new cds (including under different guises)

move to a cheap part of town

don't have children!!

drive a bomb

ask other performers to billet you on tour, and expect to do the same for them when they are in town

play gigs at non-folk venues, fetes, fairs, festivals, community gatherings

practise all the time so that you can be good when the gigs come in

that's all i can think of!